约定俗成
yuēdìng-súchéngTraditional 約定俗成
established by popular usage
Every meaning
yuēdìng-súchéng
- established by popular usage
Its characters
Words with 约
Words with 定
Meanings are from Mandarin The Wild’s own dictionary. Levels follow the official HSK word list (the exam’s 2025 syllabus, levels 7–9 shown together).